The Book of Zuhd and Softening of Hearts
Ṣaḥīḥ Muslim 7491
إِذَا تَثَاوَبَ أَحَدُكُمْ فَلْيُمْسِكْ بِيَدِهِ عَلَى فِيهِ فَإِنَّ الشَّيْطَانَ يَدْخُلُ
idhā tathāwaba aḥadukum falyumsik biyadihi ʿalā fīhi fa-inna ash-shayṭāna yadkhulu
Transliteration generated from the Arabic vowel marks
The full narration
The son of Abu Said al-Khudri reported on the authority of his father that Allah's Messenger (ﷺ) said:When one of you yawns, he should keep his mouth shut with the help of his hand, for it is the devil that enters therein
Source
Ṣaḥīḥ Muslim · 7491
Ṣaḥīḥ